試題詳解

77. A reactant, R, can produce either of two products, P₁ or P₂, with competing pathways, as illustrated in the reaction profile shown right. If the reaction is carried out at low temperature, which of the following best indicates the preferred product and the type of control?

(A) Preferred product P₁, kinetic control
(B) Preferred product P₁, thermodynamic control
(C) Preferred product P₂, kinetic control
(D) Preferred product P₂, thermodynamic control
(E) Preferred product R, thermodynamic control